JP2005261514A

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Publication number: JP2005261514A
Application number: JP2004075454A
Authority: JP
Inventors: Tomoshi Kidooka; 智志木戸岡
Original assignee: Pentax Corp
Current assignee: Pentax Corp
Priority date: 2004-03-17
Filing date: 2004-03-17
Publication date: 2005-09-29

Abstract

【課題】高い止血効果が得られ、しかも内視鏡の観察視野を遮らずに高い安全性の下で使用することができる内視鏡用嘴状高周波止血鉗子を提供すること。
【解決手段】嘴状に開閉する一対の嘴状電極３を先端に有する内視鏡用嘴状高周波止血鉗子において、一対の嘴状電極３を各々、あい対向する面全体が噛み合わせ面３ａになる非カップ状に形成する。なお、各嘴状電極３の背部３ｂを先側へ漸次窄まったテーパ状に形成し、各嘴状電極３の側面部分３ｃも先側へ漸次窄まったテーパ状に形成してもよい。
【選択図】図１The present invention provides an endoscopic saddle-like high-frequency hemostatic forceps that can obtain a high hemostatic effect and can be used with high safety without obstructing the observation visual field of the endoscope.
In an endoscopic saddle-shaped high-frequency hemostatic forceps having a pair of saddle-like electrodes 3 that open and close like a saddle, the pair of saddle-like electrodes 3 are opposed to each other with their entire opposing surfaces in meshing surfaces 3a. Formed into a non-cup shape. Alternatively, the back portion 3b of each saddle-shaped electrode 3 may be formed in a tapered shape gradually narrowing toward the front side, and the side surface portion 3c of each saddle-shaped electrode 3 may be formed in a tapered shape gradually narrowing toward the front side.
[Selection] Figure 1

Description

Translated fromJapanese

この発明は内視鏡用嘴状高周波止血鉗子に関する。 The present invention relates to a saddle-like high-frequency hemostatic forceps for an endoscope.

内視鏡用嘴状高周波止血鉗子は一般に、嘴状に開閉する一対の嘴状電極を先端に有しており、そのような嘴状電極は各々、断面形状が円形のステンレス棒材を切削して鉗子カップ状に形成されている（例えば、特許文献１）。
特開平１０−１５５７９８Endoscopic high-frequency hemostatic forceps for endoscope generally have a pair of hook-shaped electrodes that open and close like a hook, and each of these hook-shaped electrodes cuts a stainless steel bar having a circular cross section. And formed into a forceps cup shape (for example, Patent Document 1).
JP-A-10-155798

しかし、上述のような従来の内視鏡用嘴状高周波止血鉗子は、各嘴状電極が鉗子カップ状に形成されていることにより、粘膜組織に接触する鉗子カップの縁部分において高周波電流の電流密度が非常に大きくなるため、切開効果が生じて止血効果が低くなってしまう場合がある。 However, the conventional scissors-like high-frequency hemostatic forceps for endoscopes as described above have a current of a high-frequency current at the edge portion of the forceps cup that contacts the mucosal tissue because each scissors-like electrode is formed in a forceps cup shape. Since the density becomes very large, an incision effect may occur and the hemostatic effect may be reduced.

また、嘴状電極の外面が鉗子カップ状にこんもりとした形状なので、内視鏡観察画面中においては、図６に示されるように、嘴状電極３０によって観察視野が大きく遮られてしまう欠点がある。 In addition, since the outer surface of the hook-shaped electrode is thick in the shape of a forceps cup, there is a drawback that the observation visual field is largely blocked by the hook-shaped electrode 30 in the endoscopic observation screen as shown in FIG. is there.

そこで本発明は、高い止血効果が得られ、しかも内視鏡の観察視野を遮らずに高い安全性の下で使用することができる内視鏡用嘴状高周波止血鉗子を提供することを目的とする。 Therefore, an object of the present invention is to provide an endoscopic saddle-shaped high-frequency hemostatic forceps which can obtain a high hemostatic effect and can be used under high safety without obstructing the observation visual field of the endoscope. To do.

上記の目的を達成するため、本発明の内視鏡用嘴状高周波止血鉗子は、嘴状に開閉する一対の嘴状電極を先端に有する内視鏡用嘴状高周波止血鉗子において、一対の嘴状電極を各々、あい対向する面全体が噛み合わせ面になる非カップ状に形成したものであり、その場合に、一対の嘴状電極の噛み合わせ面が、側方から見て山と谷が噛み合う波形に形成されていてもよい。 In order to achieve the above object, an endoscopic saddle-shaped high-frequency hemostatic forceps for endoscope according to the present invention is a pair of scissors-like high-frequency hemostatic forceps for endoscope having a pair of saddle-shaped electrodes that open and close like a saddle at the tip. In this case, the meshing surfaces of the pair of bowl-shaped electrodes have peaks and valleys as viewed from the side. You may form in the waveform which meshes | engages.

なお、各嘴状電極の背部が先側へ漸次窄まったテーパ状に形成されているとよく、各嘴状電極の側面部分も先側へ漸次窄まったテーパ状に形成されていてもよい。 In addition, the back part of each hook-shaped electrode is good to be formed in the taper shape gradually narrowed to the front side, and the side part of each hook-shaped electrode may be formed in the taper shape gradually narrowed to the front side. .

本発明によれば、一対の嘴状電極を各々、あい対向する面全体が噛み合わせ面になる非カップ状に形成したことにより、粘膜組織等を挟み込んで高周波電流を通電した時に高周波電流の電流密度が大きくならないので、切開効果が発生せず優れた止血効果を得ることができ、各嘴状電極の背部を先側へ漸次窄まったテーパ状に形成することにより、内視鏡の観察視野を遮らずに高い安全性の下で使用することができる。 According to the present invention, each of the pair of saddle-shaped electrodes is formed in a non-cup shape in which the entire opposing surfaces are meshing surfaces, so that when the high-frequency current is passed through the mucosal tissue or the like, the current of the high-frequency current is Since the density does not increase, an incision effect does not occur and an excellent hemostatic effect can be obtained. By forming the back portion of each saddle-like electrode into a tapered shape that gradually narrows forward, the observation field of the endoscope Can be used under high safety without blocking.

嘴状に開閉する一対の嘴状電極を先端に有する内視鏡用嘴状高周波止血鉗子において、一対の嘴状電極を各々、あい対向する面全体が噛み合わせ面になる非カップ状に形成すると共に、各嘴状電極の背部を、先側へ漸次窄まったテーパ状に形成する。 In an endoscopic saddle-shaped high-frequency hemostatic forceps having a pair of saddle-shaped electrodes that open and close like a saddle, the pair of saddle-shaped electrodes are each formed in a non-cup shape in which the entire opposing surfaces are mating surfaces. At the same time, the back portion of each bowl-shaped electrode is formed in a tapered shape that gradually narrows toward the front side.

図面を参照して本発明の実施例を説明する。
図１は内視鏡用嘴状高周波止血鉗子の先端付近を示しており、図示されていない内視鏡の処置具挿通チャンネルに挿脱される可撓性シース１は、ステンレス鋼線製の密着巻きコイルパイプ１ａの外周に電気絶縁性チューブ１ｂを被覆して形成されている。Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the vicinity of the distal end of a saddle-like high-frequency hemostatic forceps for an endoscope. A flexible sheath 1 inserted into and removed from a treatment instrument insertion channel of an endoscope (not shown) is a close contact made of stainless steel wire. The outer periphery of thewound coil pipe 1a is formed by covering an electrically insulatingtube 1b.

可撓性シース１の先端に連結された先端本体２の最先端部には、一対の嘴状電極３が支軸４を中心に開閉するように軸支されて、嘴状電極３を嘴状に開閉駆動するためのリンク機構５が、先端本体２に形成されたスリット２ａ内に配置されている。 A pair of saddle-shaped electrodes 3 are pivotally supported at the most distal end of thedistal end body 2 connected to the distal end of the flexible sheath 1 so as to open and close around the support shaft 4. Alink mechanism 5 for driving to open and close is disposed in aslit 2 a formed in thetip body 2.

リンク機構５の後端部分には、可撓性シース１内に軸線方向に進退自在に挿通配置されたステンレス鋼線製の操作ワイヤ６の先端が連結されていて、可撓性シース１の基端に連結されている操作部（図示せず）で操作ワイヤ６を進退操作することにより嘴状電極３を嘴状に開閉させることができ、また、操作ワイヤ６を経由して操作部側から嘴状電極３に高周波電流を通電することができる。 The rear end portion of thelink mechanism 5 is connected to the distal end of an operation wire 6 made of stainless steel wire, which is inserted in the flexible sheath 1 so as to be movable forward and backward in the axial direction. The rod-shaped electrode 3 can be opened and closed in a bowl shape by operating the operation wire 6 forward and backward with an operation unit (not shown) connected to the end, and from the operation unit side via the operation wire 6. A high-frequency current can be passed through the bowl-shaped electrode 3.

一対の嘴状電極３は、その単体の斜視図、側面図及び平面図である図２、図３及び図４にも示されるように、嘴状に閉じた際にあい対向する面全体が噛み合わせ面３ａになる非カップ状に形成されている。 As shown in FIGS. 2, 3 and 4 which are a perspective view, a side view and a plan view of the pair of saddle-shaped electrodes 3, the entire surfaces facing each other when they are closed in a saddle shape are engaged. It forms in the non-cup shape used as the mating surface 3a.

その結果、一対の嘴状電極３で粘膜組織等を挟み込んで高周波電流を通電した時に、高周波電流の電流密度が大きくならないので、切開効果が発生せず優れた止血効果を得ることができる。 As a result, when the high-frequency current is energized with the mucosal tissue sandwiched between the pair of saddle-like electrodes 3, the current density of the high-frequency current does not increase, so that an incision effect does not occur and an excellent hemostatic effect can be obtained.

この実施例の噛み合わせ面３ａは側方から見て９０°程度の角度の角波形状に形成されていて、その角波形の先端どうしがぶつかり合うのではなく、一対の嘴状電極３において山と谷が噛み合うように形成してある。 The meshing surface 3a of this embodiment is formed in an angular wave shape having an angle of about 90 ° when viewed from the side, and the ends of the angular waveform do not collide with each other. It is formed so that the trough meshes.

それによって、一対の嘴状電極３の双方の噛み合わせ面３ａの間が広い面積においてほぼ均一な隙間になり、そのような一対の嘴状電極３の間に粘膜組織を挟み込むと、角波形状の噛み合わせ面３ａがほぼ全面で粘膜組織に接触する。 As a result, a substantially uniform gap is formed in a wide area between the meshing surfaces 3a of the pair of saddle-shaped electrodes 3, and when a mucosal tissue is sandwiched between the pair of saddle-shaped electrodes 3, an angular wave shape is obtained. The occlusal surface 3a almost contacts the mucosal tissue.

その結果、噛み合わせ面３ａが平面である場合より高周波電流の電流密度が小さくなって、より優れた止血効果が得られる。なお、角波形の角度は９０°以外であってもよく、或いはサインカーブ等のような曲線的な波形により山と谷が噛み合うように構成しても差し支えない。 As a result, the current density of the high-frequency current becomes smaller than when the meshing surface 3a is a flat surface, and a more excellent hemostatic effect can be obtained. The angle of the angular waveform may be other than 90 °, or it may be configured such that the peaks and valleys are engaged with each other by a curved waveform such as a sine curve.

また、各嘴状電極３の背部３ｂは、先側へ漸次窄まったテーパ状に形成されている。その結果、内視鏡観察画面中においては、図５に示されるように、嘴状電極３によって観察視野が大きく遮られず、良好な視界が得られるので、高い安全性の下で止血処置を行うことができる。なお、図５には、比較のために従来の嘴状電極３０を二点鎖線で示してある。 Moreover, theback part 3b of each bowl-shaped electrode 3 is formed in the taper shape gradually narrowed to the front side. As a result, in the endoscopic observation screen, as shown in FIG. 5, the observation visual field is not largely obstructed by the saddle-shaped electrode 3, and a good field of view is obtained. It can be carried out. In FIG. 5, a conventional saddle-shaped electrode 30 is indicated by a two-dot chain line for comparison.

また、この実施例においては、各嘴状電極３の側面部分３ｃも、先側へ漸次窄まったテーパ状に形成されている。その結果、背部３ｂの形状とも合わせて嘴状電極３の外表面における接触面積が小さくなり、粘膜組織に対する熱的悪影響を小さくすることができる。 Further, in this embodiment, the side surface portion 3c of each bowl-shaped electrode 3 is also formed in a tapered shape that gradually narrows toward the front side. As a result, the contact area on the outer surface of the bowl-shaped electrode 3 is reduced together with the shape of theback portion 3b, and the thermal adverse effect on the mucosal tissue can be reduced.

嘴状電極３の支軸４と係合する軸孔３ｄより後方部分には、リンク機構５の一部を構成するアーム部３ｅが延出形成されている。ただし、この部分の形状等はどのようにしても差し支えない。 An arm portion 3e constituting a part of thelink mechanism 5 is formed to extend from a portion behind theshaft hole 3d that engages with the support shaft 4 of the bowl-shaped electrode 3. However, the shape or the like of this part may be any way.

本発明の実施例の内視鏡用嘴状高周波止血鉗子の先端付近の側面断面図である。It is side surface sectional drawing of the front-end | tip vicinity of the bowl-shaped high frequency hemostatic forceps for endoscopes of the Example of this invention.本発明の実施例の嘴状電極の単体の斜視図である。It is a perspective view of the simple substance of the bowl-shaped electrode of the Example of this invention.本発明の実施例の嘴状電極の単体の側面図である。It is a side view of the simple substance of the bowl-shaped electrode of the Example of this invention.本発明の実施例の嘴状電極の単体の平面図である。It is a top view of the simple substance of the bowl-shaped electrode of the Example of this invention.本発明の実施例の内視鏡用嘴状高周波止血鉗子の内視鏡観察画像を示す略示図である。It is a schematic diagram which shows the endoscopic observation image of the saddle-like high frequency hemostatic forceps for endoscopes of the Example of this invention.従来の内視鏡用嘴状高周波止血鉗子の内視鏡観察画像を示す略示図である。It is a schematic diagram showing an endoscopic observation image of a conventional endoscopic saddle-like high-frequency hemostatic forceps.

符号の説明Explanation of symbols

１可撓性シース
３嘴状電極
３ａ噛み合わせ面
３ｂ背部
３ｃ側面部分DESCRIPTION OF SYMBOLS 1Flexible sheath 3 Gutter-shaped electrode 3aMeshing surface 3b Back part 3c Side part

Claims

Translated fromJapanese

嘴状に開閉する一対の嘴状電極を先端に有する内視鏡用嘴状高周波止血鉗子において、
上記一対の嘴状電極を各々、あい対向する面全体が噛み合わせ面になる非カップ状に形成したことを特徴とする内視鏡用嘴状高周波止血鉗子。In an endoscopic saddle-like high-frequency hemostatic forceps having a pair of saddle-like electrodes that open and close like a saddle,
An endoscopic saddle-shaped high-frequency hemostatic forceps, wherein the pair of saddle-shaped electrodes are formed in a non-cup shape in which the entire opposing surfaces are meshing surfaces.

上記一対の嘴状電極の噛み合わせ面が、側方から見て山と谷が噛み合う波形に形成されている請求項１記載の内視鏡用嘴状高周波止血鉗子。The endoscopic saddle-shaped high-frequency hemostatic forceps according to claim 1, wherein the meshing surfaces of the pair of saddle-shaped electrodes are formed in a waveform in which peaks and valleys mesh with each other when viewed from the side.

上記各嘴状電極の背部が先側へ漸次窄まったテーパ状に形成されている請求項１又は２記載の内視鏡用嘴状高周波止血鉗子。The saddle-shaped high-frequency hemostatic forceps for endoscope according to claim 1 or 2, wherein a back portion of each of the saddle-shaped electrodes is formed in a tapered shape that gradually narrows toward the front side.

上記各嘴状電極の側面部分も先側へ漸次窄まったテーパ状に形成されている請求項３記載の内視鏡用嘴状高周波止血鉗子。4. The endoscopic saddle-shaped high-frequency hemostatic forceps according to claim 3, wherein side surfaces of each of the saddle-shaped electrodes are also formed in a tapered shape that gradually narrows forward.